Bash script to check if there is a local command's version before the global one

local_or_global.sh

#!/bin/bash
alias be='local_or_global behat'
alias comp='local_or_global composer /usr/local/bin/'
function local_or_global() {
    if [ -f ./bin/$1 ]
    then
        echo "LOCAL:"
        ./bin/$1
    elif [ $2 ] && [ -f $2$1 ]
    then
        echo "CUSTOM:"
        $2$1
    else
        echo "GLOBAL:"
        /usr/bin/$1
    fi  
}